40pc Wedding Colorful Acrylic Sew-on Resin Rhinestone Flatback Buttons Beads long Rectangular 718mm Wedding Colorful acrylic Sew-on Resin Rhinestone Flatback Buttons Beads long Rectangular size 7*18mm , 1 inch = 25.4mm or 1mm = 0.0393 inch QTY:40pcs ,material :acrylic Color: AB rainbow color two holes sewing on